in a head-on collision in byron yesterday and last night in concord, a 21-year-old man riding a skateboard was hit and killed. a clayton woman hit the skateboarder at monument boulevard. police say the concord man was in the crosswalk when he was hit. he suffered major injuries and died at the hospital. they are still looking whether or not the traffic signal was working or drugs or alcohol were involved. >>> the byron highway in contra costa is reopened following a head-on accident that killed two people there including a young boy. the accident happened around 3:30 on the stretch of highway that crosses the california aqueduct. they swerved across the yellow line and smashed moot big rig. boy believed to be eight and nine died at the scene. the driver died at the hospital. >>> supreme court will review a suit challenging a federal defense of marriage act as well as prop 8 that bangs gay marriage. it will impact gay rights in the country. >> reporter: couples are getting married here but not same-sex couples. the decision was overturned in 2008 when they supported the ban on gay marriage.